SMT-DRIVE CO., LTD HD220-3 crawler bulldozer is a new generation product which is developed and produced by SMT-DRIVE CO.,LTD on the basis of rich experience in special producing the crawler bulldozer for 30 years more and inheriting the features of TY20 bulldozer ripe technology,reliable quality and stable performance. It adopts the advanced world technology and a new design concept. It is of high comfortability,low fuel consumption,and up to the requirement of Europe II Exhaustion Standard.